Residents of Brentwood, Twain harte Sugar Pine and Crystal Falls are being urged to continue conserving water.
Tim McCullough at the Tuolumne Utilities District says damage to the PG&E flume means water will be scarce for those communities for another day.
The flume just below the Lyons Dam took some damage from falling rocks. McCullough says officials are hoping to have the system fixed and water restored by noon Wednesday.
Areas above Phoenix Lake as far up as Mi Wuk Village area impacted.